Fifteen-year-old American CiCi Bellis, who made a big splash at last year's US Open, advanced Friday to a potential third-round match against Serena Williams by beating Zarina Diyas 6-2, 6-1 at the Miami Open.

ESPN's Antonietta Collins talks to senior writer Greg Garber about the biggest players in women's tennis who will be at the Miami Masters and whether Serena Williams will defend the title on her "home" court.